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parity bit

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parity bit
n. Computer Science
A bit added to a binary code that indicates parity and is used to check the integrity of data.
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Noun1.parity bit - (computer science) a bit that is used in an error detection procedure in which a 0 or 1 is added to each group of bits so that it will have either an odd number of 1's or an even number of 1's; e.g., if the parity is odd then any group of bits that arrives with an even number of 1's must contain an error
check bit, parity
computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures
bit - a unit of measurement of information (from binary + digit); the amount of information in a system having two equiprobable states; "there are 8 bits in a byte"
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If an odd number of bits are changed during the transmission of data, in say the saving of information onto a CD or DVD, or in a file, then the parity bit will be incorrect and will thus indicate that an error has occurred.
Dr Maths by Evening Chronicle (Newcastle, England)
 
 
 
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